Display screen or portion thereof with a graphical user interface



The file of this patent contains at least one drawing/photograph executed in color. Copies of this patent with color drawing(s)/photograph(s) will be provided by the Office upon request and payment of the necessary fee.

The FIGURE is a front view of a display screen or portion thereof with a graphical user interface showing my new design.

The long-short broken line showing of a display screen or portion thereof is included for the purpose of illustrating portions of the article and forms no part of the claimed design. 

CLAIM The ornamental design for a display screen or portion thereof with a graphical user interface, as shown and described. 